Even with the Iraqi war, we're talking about a regime that killed hundreds of thousands of its political opponents [1], gassed civilians [2], and engaged in genocide [3]. It is really not clear to me that stern talking and maybe sanctions while essentially abandoning victims to be slaughtered by the regime is the moral choice here. See also: Syria.
Plus, when it gets to the actual intervention, tech minimises casualties, making the war shorter and enabling more precise strikes. The US did not need to indiscriminately shell cities like Russia does in its current war.